Compleatly putting aside that I just like him more, I read many peoples arguments on both sides, and even though I think Spidermans mutant powers would ultimatly seal the match, I have to accept that Batmans got mad martial skillz and lotsa gadgets, many of which would be more effective against spider man than I'm willing to adimt (heck, he DID have the shark repellant, there's no telling what he's got!)

However, in the end, with both those sides weighed and it looking like a draw, I went back to an argument of another thread:

Spider man, with his stealth and cool acrobatics is kinda like a ninja
Batman, with his acrobatics, and cool throwing things is like a cyborg ninja (or a space ninja)

and I believe the end chart ended up like this (or at least this is what I concluded):

Spiderman, no contest. He not only is exxtremely smart but also has true super powers. And no matter how much technology Batman broke out the spidy senses would win. Besides, there is no way batman can defeat Spidey's web.